2020MNRAS.496.1638M

Query : 2020MNRAS.496.1638M

2020MNRAS.496.1638M - Mon. Not. R. Astron. Soc., 496, 1638-1644 (2020/August-1)

Confirmation of water emission in the dayside spectrum of the ultrahot Jupiter WASP-121b.

MIKAL-EVANS T., SING D.K., KATARIA T., WAKEFORD H.R., MAYNE N.J., LEWIS N.K., BARSTOW J.K. and SPAKE J.J.

Abstract (from CDS):

We present four new secondary eclipse observations for the ultrahot Jupiter WASP-121b acquired using the Hubble Space Telescope Wide Field Camera 3. The eclipse depth is measured to a median precision of 60 ppm across 28 spectroscopic channels spanning the 1.12-1.64 µm wavelength range. This is a considerable improvement to the 90 ppm precision we achieved previously for a single eclipse observation using the same observing set-up. Combining these data with those reported at other wavelengths, a blackbody spectrum for WASP-121b is ruled out at >6σ confidence and we confirm the interpretation of previous retrieval analyses that found the data are best explained by a dayside thermal inversion. The updated spectrum clearly resolves the water emission band at 1.3-1.6 µm, with higher signal-to-noise than before. It also fails to reproduce a bump in the spectrum at 1.25 µm derived from the first eclipse observation, which had tentatively been attributed to VO emission. We conclude that the latter was either a statistical fluctuation or a systematic artefact specific to the first eclipse data set.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: spectroscopic - planets and satellites: atmospheres

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 CD-38 3220b Pl 07 10 24.0604565856 -39 05 50.571250476           ~ 421 0

Query : 2020MNRAS.496.1638M

Basic data :
CD-38 3220b -- Extra-solar Planet
Other object types: otypes_help 		Pl (), Pl? (2016ApJ,TOI,...), * (CD)
ICRS coord. (ep=J2000) : 		07 10 24.0604565856 -39 05 50.571250476 (Optical) [ 0.0087 0.0098 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		07 08 42.0853194036 -39 00 52.360804257 [ 0.0087 0.0098 90 ]
Gal coord. (ep=J2000) : 		250.2938128858654 -13.3251671204701 [ 0.0087 0.0098 90 ]
Proper motions mas/yr : 		-3.735 25.663 [0.012 0.013 90] A 2020yCat.1350....0G
Parallaxes (mas): 		3.7996 [0.0104] A 2020yCat.1350....0G
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Identifiers (5) :
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CD-38 3220b TOI-495b WASP-121b
NAME-IAU Tylos TOI-495.01

References (421 between 1850 and 2026) (Total 421)
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